Switching from linear to cyclic d-Polyvalerolactone synthesized via zeolitic imidazolate framework as a catalyst: A promising approach; Applied Organometallic Chemistry; Vol. 33, iss. 5

Switching from linear to cyclic d-Polyvalerolactone synthesized via zeolitic imidazolate framework as a catalyst: A promising approach; Applied Organometallic Chemistry; Vol. 33, iss. 5

Dades bibliogràfiques
Parent link:	Applied Organometallic Chemistry Vol. 33, iss. 5.— 2019.— [e4890, 10 p.]
Autor corporatiu:	Национальный исследовательский Томский политехнический университет Исследовательская школа химических и биомедицинских технологий
Altres autors:	Naz F. Farah, Mousavi B. Bibimaryam, Luo Zh. Zhixiong, Jabbour Ch. Christia, Heynderickx Ph. M. Philippe, Chaemchuen Somboon, Verpoort F. V. K. Frensis Valter Kornelius
Sumari:	Title screen A series of spray dried zeolitic imidazolate frameworks (ZIFs = ZIF‐8, ZIF‐67, and Zn/Co‐ZIF) are used as a catalyst for the bulk ring‐opening polymerization of δ‐valerolactone without any co‐catalyst to generate polyvalerolactone. Interestingly, using the same catalyst under the same reaction conditions could manipulate the structure of the product polymer, and thus its physical properties. Thus, using a dried substrate leads to the formation of the cyclic polymer while a linear polymer was formed on using the commercially available substrate. An activated monomer mechanism has been suggested where the propagating zinc alkoxide undergoes an intramolecular transesterification to release cyclic or linear polyvalerolactone. The ROP of δ‐VL without drying shows that the polymeric zwitterions have little tendency to cyclize in the presence of moisture. At 140 °C, ZIF‐8 shows a superior catalytic activity resulting in the production of cyclic polyvalerolactone having a high molecular weight as compared to ZIF‐67 or Zn/Co‐ZIF due to the presence of highly active sites. The catalyst could be recycled and reused without any significant loss of catalytic activity.
Idioma:	anglès
Publicat:	2019
Matèries:	электронный ресурс труды учёных ТПУ biodegradable polymer heterogeneous catalyst polyvalerolactone ring opening polymerization zeolitic imidiazolate framework биоразлагаемые полимеры гетерогенные катализаторы полимеризация цеолитные катализаторы
Accés en línia:	https://doi.org/10.1002/aoc.4890
Format:	Electrònic Capítol de llibre
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662593

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